Fireworks and rockets for elytra in Minecraft
A Firework Star in the recipe turns the rocket into a firework that explodes.

A Firework Star sets the color and shape of a firework rocket's explosion.
It is made with the Crafting Table from Gunpowder and Black Dye (or another variant) (other recipes also exist).
Gunpowder and at least one dye make a star; add a fire charge for a large ball, a gold nugget for a star, a mob head for a creeper face or a feather for a burst. A diamond adds a trail and glowstone dust a twinkle. Combine stars with paper and gunpowder to build the rocket.
Gunpowder + Any of #dyes → Firework Star
Firework Star + Any of #dyes → Firework Star
// Slots with several items cycle through every accepted option.
A Firework Star in the recipe turns the rocket into a firework that explodes.
At the Crafting Table: 1 × Gunpowder and 1 × Black Dye (or another variant) give 1 × Firework Star.
It designs firework explosions. It is an ingredient in one recipe: Firework Rocket.